期刊论文详细信息
Boundary value problems | |
Existence of periodic solutions for first-order delay differential equations via critical point theory | |
Lichun Chen1  Shao-Kang Zhang1  | |
[1] Department of Mathematics and Statistics, Zhaotong University, Zhaotong, P.R. China | |
关键词: weak linking; linking; periodic solution; critical point; | |
DOI : 10.1186/1687-2770-2013-254 | |
学科分类:数学(综合) | |
来源: SpringerOpen | |